Method and apparatus for transmitting and receiving uplink data in mobile communication system

Abstract

A method for transmitting uplink data using multiple carriers by a User Equipment (UE) in a mobile communication system is provided. The method includes determining a first maximum transmission power indicating a maximum transmission power for each carrier and a second maximum transmission power indicating a maximum transmission power for all carriers based on information for setting transmission power, received from an evolved Node B (eNB), determining a minimum value from among a required transmission power and the first maximum transmission power as an uplink transmission power, for each carrier, scaling the determined uplink transmission powers so that a sum of the uplink transmission powers is less than or equal to the second maximum transmission power, and transmitting the uplink data based on the scaled uplink transmission powers.

What is claimed is: 
     
       1. A method for transmitting uplink data using multiple carriers by a User Equipment (UE) in a mobile communication system, the method comprising:
 receiving information for setting transmission power from an evolved Node B (eNB); 
 determining first maximum transmission powers for the multiple carriers, each first maximum transmission power indicating a maximum transmission power for a respective carrier of the multiple carriers, and a second maximum transmission power indicating a maximum total transmission power for all of the multiple carriers based on the information for setting transmission power; 
 determining an uplink transmission power for each respective carrier of the multiple carriers by selecting a minimum value for the carrier, the minimum value being selected from among a required transmission power for the carrier and the first maximum transmission power for the carrier; 
 scaling at least one of the determined uplink transmission powers; and 
 transmitting the uplink data based on the scaled at least one of the determined uplink transmission powers, 
 wherein a sum of the scaled at least one of the determined uplink transmission powers of all the multiple carriers is less than or equal to the second maximum transmission power, and 
 wherein the determining of the first maximum transmission powers for each of the respective carriers comprises: 
 determining a maximum value of the first maximum transmission power for the carrier and a minimum value of the first maximum transmission power for the carrier based on the information for setting transmission power; and 
 determining the first maximum transmission power for the carrier such that the value of the first maximum transmission power for the carrier is less than or equal to the maximum value of the first maximum transmission power for the carrier and greater than or equal to the minimum value of the first maximum transmission power for the carrier. 
 
     
     
       2. The method of  claim 1 , wherein the maximum value of the first maximum transmission power for the carrier is determined as a minimum value from among a maximum transmission power allowed in the carrier and a maximum transmission power available in the carrier by the UE. 
     
     
       3. The method of  claim 1 , wherein the minimum value of the first maximum transmission power for the carrier is determined as a minimum value from among a difference between a maximum transmission power allowed in the carrier and an allowed power reduction value for satisfying spurious emission requirements, and a difference between a maximum transmission power available in the carrier by the UE and the allowed power reduction value for satisfying spurious emission requirements. 
     
     
       4. The method of  claim 1 , wherein the determining of the second maximum transmission power comprises:
 determining a maximum value of the second maximum transmission power based on a capability of the UE; 
 determining a minimum value of the second maximum transmission power based on an allowed power reduction value for satisfying spurious emission requirements; and 
 determining the second maximum transmission power whose value is less than or equal to the maximum value of the second maximum transmission power and greater than or equal to the minimum value of the second maximum transmission power. 
 
     
     
       5. The method of  claim 4 , wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE and maximum transmission powers for carriers configured in the UE. 
     
     
       6. The method of  claim 4 , wherein the minimum value of the second maximum transmission power is determined from the maximum value of the second maximum transmission power of the UE and an allowed power reduction value for satisfying spurious emission requirements. 
     
     
       7. The method of  claim 3 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       8. The method of  claim 4 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       9. The method of  claim 6 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       10. The method of  claim 1 , wherein the second maximum transmission power is a maximum transmission power for the UE. 
     
     
       11. An apparatus for transmitting uplink data using multiple carriers by a User Equipment (UE) in a mobile communication system, the apparatus comprising:
 a receiver for receiving information for setting transmission power from an evolved Node B (eNB); 
 a controller for determining first maximum transmission powers for the multiple carriers, each first maximum transmission power indicating a maximum transmission power for a respective carrier of the multiple carriers, and a second maximum transmission power indicating a maximum total transmission power for all of the multiple carriers based on the information for setting transmission power, for determining an uplink transmission power for each respective carrier of the multiple carriers by selecting a minimum value for the carrier, the minimum value being selected from among a required transmission power for the carrier and the first maximum transmission power for the carrier, and for, if a sum of the determined uplink transmission powers is greater than the second maximum transmission power, scaling at least one of the determined uplink transmission powers; and 
 a transmitter for transmitting the uplink data based on the scaled at least one of the determined uplink transmission powers, 
 wherein a sum of the scaled at least one of the determined uplink transmission powers of all the multiple carriers is less than or equal to the second maximum transmission power, and 
 wherein, for each of the respective carriers, the controller: 
 determines a maximum value of the first maximum transmission power for the carrier and a minimum value of the first maximum transmission power for the carrier based on the information for setting transmission power; and 
 determines the first maximum transmission power for the carrier whose value is less than or equal to the maximum value of the first maximum transmission power for the carrier and greater than or equal to the minimum value of the first maximum transmission power for the carrier. 
 
     
     
       12. The apparatus of  claim 11 , wherein the maximum value of the first maximum transmission power for the carrier is determined as a minimum value from among a maximum transmission power allowed in the carrier and a maximum transmission power available in the carrier by the UE. 
     
     
       13. The apparatus of  claim 11 , wherein the minimum value of the first maximum transmission power for the carrier is determined as a minimum value from among a difference between a maximum transmission power allowed in the carrier and an allowed power reduction value for satisfying spurious emission requirements, and a difference between a maximum transmission power available in the carrier by the UE and the allowed power reduction value for satisfying spurious emission requirements. 
     
     
       14. The apparatus of  claim 11 , wherein the controller:
 determines a maximum value of the second maximum transmission power based on a capability of the UE; 
 determines a minimum value of the second maximum transmission power based on an allowed power reduction value for satisfying spurious emission requirements; and 
 determines the second maximum transmission power such that the value of the second maximum transmission power is less than or equal to the maximum value of the second maximum transmission power and greater than or equal to the minimum value of the second maximum transmission power. 
 
     
     
       15. The apparatus of  claim 14 , wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE and maximum transmission powers for carriers configured in the UE. 
     
     
       16. The apparatus of  claim 14 , wherein the minimum value of the second maximum transmission power is determined from a maximum value of the second maximum transmission power of the UE and an allowed power reduction value for satisfying spurious emission requirements. 
     
     
       17. The apparatus of  claim 13 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       18. The apparatus of  claim 14 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       19. The apparatus of  claim 16 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       20. The apparatus of  claim 11 , wherein the second maximum transmission power is a maximum transmission power for the UE. 
     
     
       21. A method for receiving uplink data transmitted using multiple carriers from a User Equipment (UE) by an evolved Node B (eNB) in a mobile communication system, the method comprising:
 transmitting information, for setting transmission power for the uplink data, to the UE; and 
 receiving, from the UE, uplink data that is transmitted with uplink transmission powers scaled based on the information for setting transmission power, 
 wherein for the scaled uplink transmission powers, a first maximum transmission power is determined for each respective carrier of the multiple carriers, each first maximum transmission power indicating a maximum transmission power for the carrier, a second maximum transmission power is determined indicating a maximum total transmission power for all carriers of the multiple carriers based on the information for setting transmission power, an uplink transmission power is determined for each respective carrier of the multiple carriers by selecting a minimum value for the carrier, the minimum value being selected from among a required transmission power for the carrier and the first maximum transmission power for the carrier, and, if a sum of the determined uplink transmission powers is greater than the second maximum transmission power, at least one of the determined uplink transmission powers are scaled, and 
 wherein the scaled at least one of the determined uplink transmission powers of all the multiple carriers is less than or equal to the second maximum transmission power, and 
 wherein for the first maximum transmission power for each of the respective carriers, a maximum value of the first maximum transmission power for the carrier and a minimum value of the first maximum transmission power for the carrier are determined by the UE based on the information for setting transmission power, and 
 wherein the first maximum transmission power for the carrier is determined to have a value which is less than or equal to the maximum value of the first maximum transmission power for the carrier and greater than or equal to the minimum value of the first maximum transmission power for the carrier. 
 
     
     
       22. The method of  claim 21 , wherein the maximum value of the first maximum transmission power for the carrier is determined as a minimum value from among a maximum transmission power allowed in the carrier and a maximum transmission power available in the carrier by the UE. 
     
     
       23. The method of  claim 21 , wherein the minimum value of the first maximum transmission power for the carrier is determined as a minimum value from among a difference between a maximum transmission power allowed in the carrier and an allowed power reduction value for satisfying spurious emission requirements, and a difference between a maximum transmission power available in the carrier by the UE and the allowed power reduction value for satisfying spurious emission requirements. 
     
     
       24. The method of  claim 21 , wherein for the second maximum transmission power, a maximum value of the second maximum transmission power is determined by the UE based on a capability of the UE, a minimum value of the second maximum transmission power is determined based on an allowed power reduction value for satisfying spurious emission requirements, and the second maximum transmission power is determined to have a value which is less than or equal to the maximum value of the second maximum transmission power and greater than or equal to the minimum value of the second maximum transmission power. 
     
     
       25. The method of  claim 24 , wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE and maximum transmission powers for carriers configured in the UE. 
     
     
       26. The method of  claim 24 , wherein the minimum value of the second maximum transmission power is determined from a maximum value of the second maximum transmission power of the UE and the allowed power reduction value for satisfying spurious emission requirements. 
     
     
       27. The method of  claim 23 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       28. The method of  claim 24 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       29. The method of  claim 26 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       30. The method of  claim 21 , wherein the second maximum transmission power is a maximum transmission power for the UE. 
     
     
       31. An apparatus for receiving uplink data transmitted using multiple carriers from a User Equipment (UE) by an evolved Node B (eNB) in a mobile communication system, the apparatus comprising:
 a transmitter for transmitting information, for setting transmission power for the uplink data, to the UE; and 
 a receiver for receiving, from the UE, uplink data that is transmitted with uplink transmission powers scaled based on the information for setting transmission power, 
 wherein for the scaled uplink transmission powers, first maximum transmission powers for the multiple carriers, each first maximum transmission power indicating a maximum transmission power for a respective carrier of the multiple carriers, and a second maximum transmission power indicating a maximum total transmission power for all carriers of the multiple carriers, are determined based on the information for setting transmission power, an uplink transmission power is determined for each respective carrier of the multiple carriers by selecting a minimum value for the carrier, the minimum value being selected from among a required transmission power for the carrier and the first maximum transmission power for the carrier, and, if a sum of the determined uplink transmission powers is greater than the second maximum transmission power, at least one of the determined uplink transmission powers are scaled, and 
 wherein the scaled at least one of the determined uplink transmission powers of all the multiple carriers is less than or equal to the second maximum transmission power, and 
 wherein for the first maximum transmission power for each of the respective carriers, a maximum value of the first maximum transmission power for the carrier and a minimum value of the first maximum transmission power for the carrier are determined by the UE based on the information for setting transmission power, and 
 wherein the first maximum transmission power for the carrier is determined to have a value which is less than or equal to the maximum value of the first maximum transmission power for the carrier and greater than or equal to the minimum value of the first maximum transmission power for the carrier. 
 
     
     
       32. The apparatus of  claim 31 , wherein the maximum value of the first maximum transmission power for the carrier is determined as a minimum value from among a maximum transmission power allowed in the carrier and a maximum transmission power available in the carrier by the UE. 
     
     
       33. The apparatus of  claim 31 , wherein the minimum value of the first maximum transmission power for the carrier is determined as a minimum value from among a difference between a maximum transmission power allowed in the carrier and an allowed power reduction value for satisfying spurious emission requirements, and a difference between a maximum transmission power available in the carrier by the UE and the allowed power reduction value for satisfying spurious emission requirements. 
     
     
       34. The apparatus of  claim 31 , wherein for the second maximum transmission power, a maximum value of the second maximum transmission power is determined by the UE based on a capability of the UE, a minimum value of the second maximum transmission power is determined based on an allowed power reduction value for satisfying spurious emission requirements, and the second maximum transmission power is determined to have a value which is less than or equal to the maximum value of the second maximum transmission power and greater than or equal to the minimum value of the second maximum transmission power. 
     
     
       35. The apparatus of  claim 34 , wherein the maximum value of the second maximum transmission power is determined from a parameter Ppowerclass related to a maximum transmission power value of the UE and maximum transmission powers for carriers configured in the UE. 
     
     
       36. The apparatus of  claim 34 , wherein the minimum value of the second maximum transmission power is determined from a maximum value of the second maximum transmission power of the UE and the allowed power reduction value for satisfying spurious emission requirements. 
     
     
       37. The apparatus of  claim 33 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       38. The apparatus of  claim 34 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       39. The apparatus of  claim 36 , wherein the allowed power reduction value for satisfying spurious emission requirements includes at least one of an amount of allocated transmission resources, a modulation scheme, and a frequency band of allocated transmission resources. 
     
     
       40. The apparatus of  claim 31 , wherein the second maximum transmission power is a maximum transmission power for the UE.